3/4" X 18 Nails are used for the bottom bars of frames and under frame ears. When assembling frames a final nail should be driven through the side bar and into the top bar to help prevent the frame from separating when being pulled from a super by the top bar. 3/4" Nails are also used to secure the bottom bars of frames to the sidebars by driving a nail through the bottom bar and into the side bar. Sold by the pound. Each pound is approximately 2600 Nails.